Every boat that floats relies on a few simple concepts that visitors will need to use for this science challenge. Visitors will learn about density and buoyancy by building a boat that will carry the largest load possible. Activities are included in admission and free to members. This is a drop-in activity, feel free to join the fun at any time from 1 to 4 p.m. Use Hagley’s main entrance off Route 141 in Wilmington, Delaware.